Question

Which part of the respiratory system is correctly paired with its function? Alveoli contract and relax to fill and empty the lungs. The voice box warms incoming air that enters the throat. Goblet cells produce white blood cells to destroy pathogens. The epiglottis prevents food from entering the larynx.

Answer 1

The correct answer would be D). The epiglottis prevents food from entering the larynx.

Answer 2

The respiratory system that is correctly paired with its function is the first option: Alveoli contract and relax to fill and empty the lungs. 
Alveoli are tiny air sacs within our lungs which allow oxygen (O) and carbon dioxide (CO2)  to move between the lungs and the bloodstream.